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Effect of molecular weight of polymer matrix on the dispersion of MWNTs in HDPE/MWNT and PC/MWNT composites

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Abstract

In this study, the effect of the molecular weight of the polymer matrix on the dispersion of multi-walled carbon nanotubes (MWNTs) was investigated for high-density polyethylene (HDPE)/MWNT and polycarbonate (PC)/MWNT composite materials. The dispersion of MWNTs in the polymer matrix showed a strong correlation with the melt viscosity of the polymer matrix, i.e., with the molecular weight of the polymer material. Several experimental methods, such as 4-point probe, SEM and ARES, were used to examine the effect of the molecular weight of the polymer matrix on the dispersion of the MWNTs and various physical properties of the composites. The use of a high melt viscosity polymer as the matrix material restricted the mobility of the MWNTs, and also hindered the dispersion of MWNTs due to the high entanglement density of the polymer matrix.

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Authors and Affiliations

  1. Department of Chemical & Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Korea

    Heonjoo Ha & Sung Chul Kim

  2. Department of Chemical Engineering, Keimyung University, Daegu, 704-701, Korea

    KiRyong Ha

Authors
  1. Heonjoo Ha
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  2. Sung Chul Kim
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  3. KiRyong Ha
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Correspondence to Sung Chul Kim.

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Ha, H., Kim, S.C. & Ha, K. Effect of molecular weight of polymer matrix on the dispersion of MWNTs in HDPE/MWNT and PC/MWNT composites. Macromol. Res. 18, 512–518 (2010). https://doi.org/10.1007/s13233-010-0510-4

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  • DOI: https://doi.org/10.1007/s13233-010-0510-4

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